Hello, I receive 'failed to create component' when designing user control in WinForms Designer.
RadControls version - Q3 2014
Visual Studio version - 2013 Community
Seems like there was a try to add a reference to already referenced assembly.
The image is in attachment

When you try to copy and paste RadSplitContainer from one form to another, it loses its child panels and if it contains any other child controls, they become children of the form.